Radk Hydro: counterBalance valve series
Counterbalance Valve

Balanced relief valve group RTHVB0024

  • Maximum pressure : 420bar
  • Rated flow rate: 60L/min
Category:

Product Overview

Primarily installed in roadheader hydraulic cylinder circuits, these valves serve two core purposes: safety protection and load maintenance.
Key Roles
  1. Balance external loads: Create backpressure to offset external load weight.
  2. Stabilize load movement: Maintain and control stability when lowering loads, prevent vibration.
  3. Ensure machine operation: Guarantee smooth running of the main roadheader.

Technical Parameters

RTHVB0024 Hydraulic Parameters
Balance valve opening pressure 350bar
Relief valve set pressure 200～350bar
Rated flow 90L/min
Maximum pressure of relief valve 400bar
Leakage ≤0.3ml/min
Fluid temperature -20~90℃

Working principle

    1. Mechanism raising/extending
      • Oil flows freely: A1→B1 or A2→B2 (reverse flow blocked).
      • Safety protection: Load relief valve parallels pressure oil circuit to limit maximum system pressure.
    2. Mechanism lowering/retracting
      • Oil flow direction: B1→A1; A2 acts as the control port.
      • Valve activation: Input control oil to A2 to open the balance valve port, enabling load pressure oil to flow B1→A1.
      • Safety protection: Same as above—load relief valve limits maximum system pressure.
        Valve operation varies by mechanism action (raising/extending vs. lowering/retracting), with consistent safety protection via load relief valves.
Technical Features
  • Ultra-low internal leakage: Cone valve structure + wire seal keeps leakage < 0.3 ml/min.
  • Easy & quick installation: Integral threaded cartridge design reduces on-site installation time.
  • Load adaptability & pressure control: 4:1 pilot ratio handles changing loads; parallel overflow valve adjusts system pressure independently for safety.

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